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Radiation Protection Dosimetry Advance Access originally published online on April 28, 2005
Radiation Protection Dosimetry 2005 114(4):551-555; doi:10.1093/rpd/nch492
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

Technical Note

Chemical composition of 14C in airborne release from the Tokai reprocessing plant, Japan

Jun Koarashi*, Kiyomitsu Akiyama, Tomohiro Asano and Hirohide Kobayashi

Tokai Works, Japan Nuclear Cycle Development Institute, Tokai-mura, Naka-gun, Ibaraki 319-1194, Japan

* Corresponding author: koarashi.jun{at}jnc.go.jp

Received December 1, 2004, amended March 21, 2005, accepted March 27, 2005

Fuel reprocessing plant is one of the most important sources of anthropogenic 14C in the environment. A method was developed to determine the amount and chemical composition of airborne 14C release from the Tokai reprocessing plant, Japan. Effluent monitoring using this method showed most of the 14C is released in CO2 form and the ratio of 14C in hydrocarbons to the total is less than 3%, not depending on the type of fuel reprocessed. This finding would provide improved understanding on dynamical behaviour of 14C in the environment and assessment of radioecological impact from nuclear fuel cycle.


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